scholarly journals The development of the spinning wheel in ancient China

2019 ◽  
Vol 70 (02) ◽  
pp. 120-124
Author(s):  
RAO JUE ◽  
LONGDI CHENG ◽  
YUNYING LIU
Keyword(s):  
Neolithic Period ◽  
Ancient China ◽  
Late Neolithic ◽  
Truncated Cone ◽  
The Cross ◽  
Changes Over Time ◽  
Over Time

As textile demand increased in ancient China, the spinning wheel became more widely used in the Neolithic era and was responsible for the main spinning tasks over the last few thousand years. This work explores the changes over time in the shape, diameter, and thickness of the spinning wheel in the Cross-lake Bridge, Hemudu, Yangshao, Qujialing, and Shijiahe cultures. The disc-like shape, mound-like shape, bead shape, and truncated cone shape are deemed to have been the best spinning wheel forms in the later stages – especially the disc-like spinning wheel. The spinning wheel with a diameter of 2–9 cm and a thickness of 0.1 to 9.0 cm was used throughout prehistoric times. In the late Neolithic period, a disc-like spinning wheel with a diameter of 3–4 cm and a thickness of less than a cm was the most frequently used design. This study shows that the change in the shape, diameter, and thickness of the spinning wheel is the inevitable result of the change in the tool’s design points, thereby revealing improvements in spinning efficiency

scholarly journals Stability of the Cross Linking Component of the Biosensor Receptor Layer after Addition of Gold Nanoparticles

2021 ◽  
Vol 25 (1) ◽  
pp. 49-52
Author(s):  
Aleksandra Kłos-Witkowska ◽  
Vasyl Martsenyuk
Keyword(s):  
Gold Nanoparticles ◽  
Conformational Changes ◽  
Cross Linking ◽  
Relative Percentage ◽  
Pure Protein ◽  
The Cross ◽  
The Stability ◽  
Changes Over Time ◽  
Over Time ◽  
Receptor Layer

In this study, the stability of the receptor layer component of a biosensor after addition of gold nanoparticles was investigated. Accelerated conformational changes under the influence of Au were demonstrated. The relative percentage changes over time between the pure protein and the Au doped protein were calculated. It was shown that these changes are greater with time and exceed 20 % in the last days of the experiment.

At the crossroads: prehistoric settlement in the Maeander valley

2007 ◽  
Vol 57 ◽  
pp. 87-99 ◽  
Author(s):  
Daniel Thompson
Keyword(s):  
Bronze Age ◽  
Western Anatolia ◽  
Late Bronze Age ◽  
Archaeological Research ◽  
Neolithic Period ◽  
Late Neolithic ◽  
Geographic Context ◽  
Settlement Dynamics ◽  
Permanent Settlement ◽  
Over Time

AbstractThe Maeander river (modern Büyük Menderes Nehri) provides the longest natural route through the mountains of central western Anatolia to link the Aegean basin to inner Anatolia, and research suggests that permanent settlement within the river's catchment had begun at least tentatively by the Late Neolithic period. However, the limited amount of archaeological research in the region has restricted our understanding of the inhabitants' settlement histories and intra- and inter-regional cultural contacts during prehistory. This paper seeks to understand better the nature of settlement dynamics and cultural interactivity from the Neolithic period through to the Late Bronze Age in this region by reviewing the available literature within a broad geographic context encompassing western Anatolia and the Aegean, neighbours whose archaeological evaluations have largely been conducted in isolation from each other. The evidence suggests that these early communities interacted with each other and inter-regionally with fluctuating intensities during prehistory, with the interior remaining more traditionally Anatolian, while the lower, coastal area experienced increasing interaction with and influence from Aegean cultures over time. The lower valley also displays a relatively static number of prehistoric sites in contrast to the middle and upper regions, where more dynamic and largely parallel settlement histories are seen.

Comparison of two devices for measuring exercise transcutaneous oxygen pressures in patients with claudication

VASA ◽  
2015 ◽  
Vol 44 (5) ◽  
pp. 355-362 ◽  
Author(s):  
Marie Urban ◽  
Alban Fouasson-Chailloux ◽  
Isabelle Signolet ◽  
Christophe Colas Ribas ◽  
Mathieu Feuilloy ◽  
...  
Keyword(s):  
Oxygen Pressure ◽  
Optical Sensors ◽  
Chemical Sensors ◽  
Transcutaneous Oxygen ◽  
Starting Values ◽  
Two Systems ◽  
Transcutaneous Oxygen Pressure ◽  
New Sensors ◽  
Changes Over Time ◽  
Over Time

Abstract. Summary: Background: We aimed at estimating the agreement between the Medicap® (photo-optical) and Radiometer® (electro-chemical) sensors during exercise transcutaneous oxygen pressure (tcpO2) tests. Our hypothesis was that although absolute starting values (tcpO2rest: mean over 2 minutes) might be different, tcpO2-changes over time and the minimal value of the decrease from rest of oxygen pressure (DROPmin) results at exercise shall be concordant between the two systems. Patients and methods: Forty seven patients with arterial claudication (65 + / - 7 years) performed a treadmill test with 5 probes each of the electro-chemical and photo-optical devices simultaneously, one of each system on the chest, on each buttock and on each calf. Results: Seventeen Medicap® probes disconnected during the tests. tcpO2rest and DROPmin values were higher with Medicap® than with Radiometer®, by 13.7 + / - 17.1 mm Hg and 3.4 + / - 11.7 mm Hg, respectively. Despite the differences in absolute starting values, changes over time were similar between the two systems. The concordance between the two systems was approximately 70 % for classification of test results from DROPmin. Conclusions: Photo-optical sensors are promising alternatives to electro-chemical sensors for exercise oximetry, provided that miniaturisation and weight reduction of the new sensors are possible.

Neuropsychological Symptoms in Posttraumatic Stress Disorder and Changes Over Time

2007 ◽  
Author(s):  
Miranda Olff ◽  
Mirjam Nijdam ◽  
Kristin Samuelson ◽  
Julia Golier ◽  
Mariel Meewisse ◽  
...  
Keyword(s):  
Posttraumatic Stress Disorder ◽  
Posttraumatic Stress ◽  
Stress Disorder ◽  
Neuropsychological Symptoms ◽  
Changes Over Time ◽  
Over Time

Changes Over Time in Adaptive Behavior Functioning of Twice-Exceptional Children

2010 ◽  
Author(s):  
Rebecca D. Stinson ◽  
Zachary Sussman ◽  
Megan Foley Nicpon ◽  
Allison L. Allmon ◽  
Courtney Cornick ◽  
...  
Keyword(s):  
Adaptive Behavior ◽  
Exceptional Children ◽  
Twice Exceptional ◽  
Changes Over Time ◽  
Over Time

Kategorisierung der Schädelform des Cavalier King Charles Spaniels

2019 ◽  
Vol 47 (02) ◽  
pp. 133-133
Keyword(s):  
Pilot Study ◽  
Cavalier King Charles Spaniel ◽  
Conformation Changes ◽  
Veterinary Record ◽  
Changes Over Time ◽  
Over Time

Knowler SP, Gillstedt L, Mitchell TJ et al. Pilot study of head conformation changes over time in the Cavalier King Charles spaniel breed. Veterinary Record 2019. doi:10.1136/vr.105135.

Uneven Decoupling

2019 ◽  
Vol 5 (4) ◽  
pp. 410-427 ◽  
Author(s):  
Ryan P. Thombs ◽  
Xiaorui Huang
Keyword(s):  
Economic Growth ◽  
Co2 Emissions ◽  
Ecological Modernization ◽  
Climate Mitigation ◽  
Data Limitations ◽  
Treadmill Of Production ◽  
Global North ◽  
Organization Of Production ◽  
Changes Over Time ◽  
Over Time

The macro-comparative decoupling literature has often sought to test the arguments made by the treadmill of production (TP) and ecological modernization (EM) theories. However, due to data limitations, these studies have been limited to analyzing the years after 1960. Given that both theories discuss historical processes operating before 1960, analyzing pre-1960 data is warranted to more comprehensively test the propositions made by both theories. We assess the long-term relationship between economic growth and CO2 emissions from 1870 to 2014 using a sample of global North nations. We use Prais-Winsten regression models with time interactions to assess whether, when, and how much CO2 emissions have decoupled from economic growth over time. We find that significant relative decoupling has occurred twice since 1870: during the last 30 years of the nineteenth century, the timing of which is contrary to what both the EM and TP theories might expect, and after 1970. We also observe that the relationship remained relatively stable from the turn of the twentieth century to approximately 1970, which aligns with the arguments made by the classical TP work. We conclude that shifts in the global organization of production have shaped the magnitude of the economic growth–CO2 emissions relationship and its changes over time, which has implications for climate mitigation policy.

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